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# File 'app/helpers/constructor_pages/treeview_helper.rb', line 3
def render_tree(roots, &block)
output = '<ul>'
roots.each do |root|
level, last = root.level, nil
root.self_and_descendants.each do |item|
if item.level > level
output += '<ul>'
elsif item.level < level
output += '</li>'
output += '</ul></li>' * (level-item.level)
elsif !item.root?
output += '</li>'
end
output += '<li>'
output += capture(item, &block)
level, last = item.level, item
end
output += '</li>'
output += '</ul></li>' * last.level
end
output.html_safe
end
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